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OR vs EX-OR vs EX-NOR | OR,EX-OR,EX-NOR gates

This page on OR vs EX-OR vs EX-NOR gates mentions truth table and logic symbols of OR,EX-OR and EX-NOR gate.

OR Logic Gate Symbol and Truth Table

OR logic gate Figure:3 OR gate logic symbol

The OR gate is an electronic circuit which gives a true output(1) if one or more of its inputs are true. A plus is used to show the OR operation. The figure-3 depicts OR logic gate symbol and table-3 below mentions truth table of OR gate.


Input-1 Input-2 Output
0 0 0
0 1 1
1 0 1
1 1 1
Table:3 OR gate truth table

EX-OR Logic Gate Symbol and Truth Table

EX-OR logic gate Figure:1 EX-OR gate logic symbol

The Exclusive-OR(i.e. EX-OR or XOR) gate is a circuit which will give a true output if either but not both of its two inputs are true. An encircled plus sign is used to show the EX-OR operation. The figure-2 depicts EX-OR logic gate symbol and table-2 below mentions truth table of EX-OR gate.


Input-1 Input-2 Output
0 0 0
0 1 1
1 0 1
1 1 0
Table:1 EX-OR gate truth table

EX-NOR Logic Gate Symbol and Truth Table

EX-NOR logic gate Figure:3 EX-NOR gate logic symbol

The 'Exclusive-NOR' gate circuit does the opposite to the EX-OR (i.e. Exclusive OR or EOR) gate. It will give a false output if either, but not both, of its inputs are true. The symbol is an EXOR gate with a small circle on the output. The small circle represents inversion. The figure-3 depicts EX-NOR logic gate symbol and table-3 below mentions truth table of EX-NOR gate.


Input-1 Input-2 Output
0 0 1
0 1 0
1 0 0
1 1 1
Table:3 EX-NOR gate truth table

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